resss



July 10, 1923. 1,461,455

P. REass TENS CARRYING DEVICE FOR CALCULATING MACHINES Filed April 20. 1922 2 Sheets-Sheet l PaulRes Patented July 10, 1923.

UNITED STATES PATENT OFFICE.

PAUL REISS, OF DANZIG, GERMANY, ASSIGNOR TO THE FIRM GUTSCHOW & CO.

G. M. B. H., 01 DANZIG, GERMANY.

TENS-CARRYING DEVICE FOR CALCULATING MACHINES.

Application filed April 20, 1922. Serial m5. 555,713.

T 0 all whom it may concern:

Be it known that I, PAUL REISS, a citizen of Germany, residing at Danzig, Germany, have invented certain new and useful Improvements in Tens-Carrying Devices for Calculating Machines, of which the following is a specification.

This invention ha reference to improvements in tens carrying devices for calculating machines, and it particularly refers to such devices of this kind in which the tens carrying operation is effected in two stages one of which constituting the preparatory or preliminary stage, while the termination of the said. operation constitutes the second stage.

Upon the accompanying drawings the invention is shown by way of example in a preferred form of embodiment.

In the drawings Figure 1 shows a part of a calculating machine provided with the tens carrying device according to my invention in sectional view taken on the line I-I of Figure 3,"

seen from the right.

Figure 2 is a partial top plan view of the device after removal of the parts interfering with the clearness of illustration.

Figure 3 is another view of the device in section on the line III-III of Figure 1.

Figure 4 is a partial elevation of the part of the machine containing the tens carrying device and seen from the left.

In the side walls of the frame 1 of the machine the shaft 51 is rotatably mounted. Upon this shaft a. plurality of gear wheels 46 is loosely arranged the number of which corresponds to the number of denominations for which the machine is designed and which will be designated as intermediate wheels in this specification. are properly spaced from each other 7 by distance pieces 52. Intermediate the disdistance pieces and the hub of the intermediate wheels 46 sleeves 75 are mounted upon the shafts 51 which are provided with downwardly extending lugs or projections 63 (Figure 1). The intermediate wheels engage on the one hand with the gear wheels 47 which are rigidly connected to the number wheels 48. The gear wheels 47 and the number wheels 48 are likewise loosely mounted upon a shaft 50 and are spaced from each other by the interposition of distance pieces, the ends of the shaft 50 be- The several wheels 46- ing mounted in the walls of the frame 1. On the other hand, the intermediate wheels engage with gear wheels 24 likewise loosely mounted upon a shaft 25 and spaced from each other by distance pieces. The shaft 25 is mounted in the side walls of the machine frame 1 so as to be axially displaceable and is connected to another shaft 25 in parallel relation therewith by means of yokes 28 and 28 (Figures 2 and 3) in such a manner that the two shafts 25 and 25 together with the yokes constitute a kind of rigid frame, the shaft 25 being also axially displaceable in the side walls of the frame 1. The yoke 28 is under the action of a spring 54 the other end of which bears against the side wall 1. By means of this spring the two shafts 25 and 25 with the parts carried thereby are normally retained in the left hand extreme position A shown in figure 3 in which the several parts of the tens carrying device are in the position which corresponds to the adjustment of the calculating machine for effecting an addition. The displacement of the shafts 25, 25 into their extreme right hand position is effected by means of a.,bar 57 (Figure 2) which is guided at the outside of the right hand side wall 1 by means of screws or the like 59 entering slots 60 of the bar, and which by means of a cam surface 61 acts upon a roller 56 provided upon the upper side of a jecting head on the right hand end of the shaft 25. Upon displacing the bar 57 in the direction of the arrow of Figure 2 which is effected by means of a handle 58 at the front end of the bar the shaft 25 with the shaft 25 connected therewith into a unit is forced into the right hand extreme position against the action of the spring 54, which corresponds to a subtraction to be effected on the calculating machine.

The hub parts 76 of the gear wheels 24 which will be broadly designated as carrying wheels in the ecification without restricting my invention to this particular construction, are provided with flanges 26 ing wheels 24 are provided with twenty. teeth, and they are in constant engagement with gears or carrying wheels 24 (Figures 1 and 2) of same size and of an equal number.of teeth which are loosely arranged side by side of each other upon the shaft 25 with interposed distance pieces. To each of the gear wheels 24 gear wheels 24 are rigidly connected which are likewise rotatably mounted upon the shaft 25. The wheels 24 and 24 both of which are narrower than the wheels 24 are at such distance from each other that the wheels 24 are kept from engagement with the wheels 24. The hubs of the wheels 24 and 24 possess flanges 26 which, similar to the flanges 26 above mentioned, are also provided with releasing fingers or ton 27 Each of the wheels 24 and 24 together with the corresponding fingers 27.constitute a complete unit rotatably mounted upon the shaft.

Underneath the' wheels 24, 24" and 24 the rack bars 23 are arranged which will be referred to hereinafter as positioning members, 0r positioning bars, and which are adapted to be displaced by the operation of the driving crank 16 of the calculating machine in the usual manner, so as to corres ond to the value of the number to which the machine is set by the corresponding numbering key, the displacement being effected in the direction of the arrow a. The indentations of the rack bars 23 in the position of the parts shown in Figure 1 which corresponds to the forward movement of the crank 16 in the direction of the arrow, are in'engagement with the carrying wheels 24, so that the displacement of the rack bars 23 is converted into a rotary movement of the number or numeral wheels 48'by means of the gear wheels 46 and 47. The rack bars 23 are guided by annular discs 22 (Figure 3) and embrace these discs by means of a slot 91 (Figure 1) which serves as a guide,

The said annular discs 22 are mounted upon a shaft 8 with the interposition of distance pieces, the said shaft 8 being journaled in the side parts 2 of a frame which is vertically displaceable in relation to the parts above described, and which, besides comprising the said side arts 2 consists of two bars 3 and 4 connecting said side parts and running transversely throughout the machine (Figure 1). This frame 2, 3, 4 is guided on the one hand by the bolts or studs 6 on the side walls 1 of the machine frame which engage with slots 5 of the side parts 2, and on the other hand, by means of the arms 9 and 10 secured to a common shaft journaled in the side walls of the machine frame. The a'rm 10 extends beyond the shaft 8 (Figure 1), and upon its free end it is provided with aroller 12 adapted to cooperate with a sector shaped cam 13 connected to the shaft 15 of the driving crank 16 by means of an arm 14. Upon the arm 14 a pawl 17 is pivoted at 20 the tip or extremity 18 of which is normally forced against the under side of the cam 13 by means of a spring 19. Upon the operation of the crank in the direction of the arrow the roller 12 slides upon the cam 13, and in this position the frame 2, 3, 4 is lifted by the arm 10 to correspond to the representation of Figure 1. After the completion of the forward movement of the crank 16 the roller 12 drops off from the cam 13, and then, upon the return movement of the crank 16 it passes below the cam 13. In the further stage of operation the tip 18 of the pawl 17 meets the roller 12 which causes the pawl to be forced downwards against the action of the spring 19. Upon continuing the return movement the roller 12 is forced out to the left below the cam 13, and the pawl 17 drops into closing osition behind it. By means of this a kin ofadditional cam surface cooperating with the cam 13 is formed which causes the roller 12 to be again lifted to the upper side of the cam 13 upon the next forward movement of the crank, and by this means the frame 2, 3, 4 with the parts therein mounted is also raised again.

In the transverse bars 3 and 4 of the adjustable frame 2, 3, 4 and above the wheels 24 carrying members or slides 128 are mounted in such a manner that they are capable of displacement in the longitudinal direction of the machine. The carrying slides are forced to the right (Figure l) by springs 32 which on the one hand are attached to the forwardly projecting arms 31 of the slides 128, and on the other hand, to the trans versebar 3. Movement in this direction, however, isnormally prevented by locking levers or pawls 40 engaging with notches provided upon the upper sides of the slides 128. Stops 29 and 30 provided on the slides 128 limit the movement of the slides in the right hand and in the left hand end position respectively. Upon their bottom sides the slides 128 are provided with two groups of teeth 33 and 33 capable of engagement with the teeth of the carrying wheels 24 and 24, 24 respectively, in case the frame 2, 3, 4 carrying the slides is lowered into its lowest extreme position in the manner above described, which causes the simultaneous disengagement of the indentations of the rack bars 23 from the wheels 24 and 24 respectlvely. Upon the rear side of each of the slides 128 (compare Figure 2) two small pawl levers or triggers 34, 34 are pivoted at 36 and 36 respectively, which at their front ends bearing upon pins or stops 35, 35' secured to the corresponding slides, are provided with downwardly projecting lugs 96 and 96 respectively, one of which 96 is situated in the path of movement of the fingers 27 of the carrying wheels 24, while the other lug 96' is 1n the path of the fingers 27 of the carrylng wheels 24 and 24", according as the shafts 25 and 25 on which the carrymen-ass ing wheels are mounted are in one or the other of their two end positions.

Upon the somewhat outwardly curved back side of each of the triggers 34 and 3 1 a lever 38 is adapted to bear common to both triggers and referred to hereinafter as the actuating lever, and which together with the locking lever 40 above mentioned constitutes a yoke shaped unit 39 (Figure 2). This piece or unit which hereinafter will be referred to as locking member is provided in a number to correspond to the number of denominations for which the machine is intended, and all such units are carried by a shaft 4:1 journaled in the side walls 2 of the adjustable frame 2, 3, 4. Above the shaft 41 another shaft 44: is mounted in the side walls 2 serving for the fastening of coil springs 43 the other ends of which act upon hooks 42 provided upon the locking members 39. By means of these springs the locking levers 40 and the actuating levers 38 are kept in contact with the slide 128, and with the triggers 34, 3d respectively.

Upon the end of the shaft 51 projecting on the left hand side of the machine (Figures 3 and 4:) a short arm is secured which is connected to the shaft 15 of the operating crank 16 by means of a rod 61 in such a manner that upon the return rnovement of the crank into its initial position, that is to say contrary to the direction of the arrow, the rod 61 is displaced in accordance with the direction of its arrow, which results in a forward rotation of the fingers or lugs 63 of the shaft 51 (in Figure 1 to the left). The fingers will thereby be caused to become engaged with abutments or projections provided 37 on the upper side of the slides 128, but only those of these slides will be moved by said fingers which previously were unlocked and had therefore assumed under the influence of the springs 32 their right hand, end position. By this means the slides 28 are forced back into their extreme position to the left with the locking levers 4:0 snapping into the corresponding locking notches.

In Figure 2, and in part also in Figure 3 those parts of which an entire set or group of identical parts corresponding to the number of rows of characters of the machine has been provided, are designated with symbols 1 to 9 to correspond to the order of the respective denomination so as to facilitate the understanding of the cooperation of the different parts in the following description of the mode of'operation of the machine. I

The mode of operation of the machine is as follows :-Assuming for instance, that an addition is to be carried out with the machine .and that .the particular quantity to which the machine has been set, contains the number 9 as the seventh and eighth charao ter (Fig. 2), and that, in the summing up operation in the sixth row the value hecomes greater than 9. The parts mounted upon the shafts 25, 25 are then set so as to assume the extreme left hand position indi-- cated at A in Figures 2 and 3 of the drawing, in which position the carrying wheels 24 and 2 1 are situated in the plane of the rack bars 23 and of the carrying slides 128. Before commencing the operation of the crank the rack bars are out of engagement with the carrying wheels, while the indentations 33, 33 of the slides 128 are in en gagement with the said wheels. Upon the forward rocking of the crank which after the adjustments of the rows to be summed up is effected the frame 2, 3, a is raised by means of the lever 10 and of the cam 13 which constitutes a unitary cam surface with the end 18 of the pawl 17. This causes the rack bars 23 and the slides 128 to assume the position indicated in Figure 1. After this operation, that is to say, after the rack bars have become engaged with the wheels 24, and the slides 128 have become disengaged from these wheels the rack bars are displaced in the direction of the arrow 0; in any suitable manner by the operation of the driving shaft, each particular rack bar being moved through a distance to correspond to the value of the figure for which the key has been depressed in the corresponding row of keys. The fingers 27 of the wheels 24 and 24 corresponding to the denomination numbers are in position indicated in Figure 1 of the drawing, in which position the figure 9 appears in the window. The finger 27 will assume the same position, as soon as the figure 9 of the corresponding numeral wheel 48 appears in the window. By now continuing the rotation of the wheel 24 by the opertion of the rack bar 23 the arin27 causes the projection 96 of the pawl 34 to be, forced sideways, and the pawlv to be lifted. In consequence thereof the pawl 34: raises the actuating lever 38 which bears upon the back of the pawl, and also the locking lever 40" which is integral with the lever 38 so as to release the carrying slide 128" the projection or tip of the pawl 34 mounted in this slide is also correspondingly moved, and becomes engaged with the finger 27 so as to be forced sideways. This results in the raising of the pawl 34' and the raising of the lever 38" resting thereupon. and the release of the locking lever 40 rigidly connected to said lever 38". This causes the slide 128 to become disengaged which by means of its spring is forced into the right extreme position, so as to also prepare this slide for the tens carrying of the corresponding row or denomination. These procedures would be continued for all the fol lowing denominations if the figure 9 would have been in the corresponding windows.

After the forward movement of the crank has been finished, and all the values of the numbers which have been set on the key board have been transferred to the number wheels 48 the roller 12 drops off from the sector cam 13, and in consequence thereof the frame 2, 3, 4 is lowered and the indenta tions 33 of the carrying slides 128 become engaged with the carrying wheels 24, while these wheels are released from the rack bars 23. Upon the return movement of the crank 16 into the initial position the lugs 63 are turned in the direction of the arrow Figure 1' in the manner hereinbefore described by meansof the rod 61 and lever and by the shaft 51 (Figure 4). During this movement the lugs 63 will become engaged with the projections 37 of the slides 128 and 128 in those rows in which the tens carrying operations have been prepared in the manner above described, which, in the present example would correspond to the seventh and eighth row, the said slides 128 and 128 being thereby forced back into their extreme left hand position. This movement of the slides causes a corresponding movement of the carrying wheels 24 and 24 in engageinent therewith, and these wheels are accordingly turned to the numeral wheels 48 and 48 operatively connected therewith by means of the intermediate wheels 46 and 46 so that in the corresponding windows the figure 9 will now be replaced by the figure 0.

When it is desired to make subtractions on the machine the frame containing the shafts 25 and 25. is moved into the position indicated by the letter S in Figure 3 by moving' the slide 57, 58 in the direction of the arrow of Figure 2. This causes the carrying wheels .24 to register with the rack bars 23 and the slides 128, and the carrying wheels 24 are forced out of the plane of these wheels 24? and slides 128 so that upon the raising of the frame 2, 3, 4 upon the beginning of the forward movement of the crank 16 the rack bars 23 become engaged with the wheels 24". Inasmuch as the wheels 24" continueto be in engagement with the wheels 24 the movement of the rack bars 23 in the direction of the arrow a causes a rotation of the wheels 24, 46 and 48 in a direction contrary to the corresponding arrows, as is regpired in theperforming of subtractions.

therwise the preparation and the performing of the tens carrying operation for the several denominations or rows is carried on entirely in accordance with the procedure above outlined with the only difierenoe,however, that the movements of the rotating parts take place in the reverse direction,

It may be pointed out that in Figure 2 for the sake of clearness of illustration the pawls or triggers 34 and 34 for the eighth and ninth row and, moreover, the carrying slide 128 and the locking lever 40 for the ninth row have been partially removed. In the sixth and seventh the carrying wheels 24 and 24 with the corresponding releasing fingers 27 are also missing. Also in Figure 3 of the drawing upon the left side thereof the members mounted upon the shafts 51 and upon shafts 25 and 25 have been partially left out.

I claim 1. In a computing machine the combination of, a group of numeral wheels of different order; two groups of carrying wheels of different order, each of the carrying wheels of one of said groups adapted to rotate one of said numeral wheels in the one direction, each of the carrying wheels of the other of said groups adapted to rotate one of said numeral wheels in the other direction; a group of positioning members of different order, each of said members adapted to rotate two of said carrying wheels in one and the same direction; a group of carrying members of different order normally tending to move in one direction; a group'o'flocking members normally locking said carrying members and adapted to release to permit the carrying members to move in said one direction; means adapted to cause said positioning means and said carrying members to engage the carrying wheels either of one or of the other of said two groups; each of said carrying wheels having a releasing member adapted to cause one of said locking members of higher order to be unlocked; means adapted to cause the releasing members of the carrying wheels of the one or of the other of said two groups to engage the locking members of the correspon ing order;-means for actuating said positioning members; and means operatively connecting to said actuating ,means and adaptedto move each of said carrying members in the other direction and thus rotating the corresponding carrying wheel one step.

2. In a computing machine the combination of, a group of numeral wheels of different order; two groups of carrying wheels of different order, each of the carrying wheels of one of said groups adapted to rotate one of said numeral wheels in the one direction, each of said carrying wheels of the other of said groups adapted to rotate one of said numeral wheels in the other direction; a group of positioning members of different order, each slides to move in said one direction; means I ada ted to cause said positioning bars and cured to each of said carrying wheels and lid adapted to cause one of sald locking memloers of higher order to be unlocked; means adapted to cause the releasing fingers of the carrying wheels of the one or of the other of said two groups to engage the locking members of the corresponding order; means for actuating said positioning bars; and meansoperatively connecting to said actuating means and adapted to move each of said carrying slides in the other direction and thus rotating the corresponding carrying wheel one step.

. 3. In a computing machine the comloina tion of, a group of numeral wheels of difierent order; two groups of carrying wheels of difierent order, each of the carrying wheels of one of said groups adapted to rotate one of said numera wheels in the one direction, each of the carrying wheels of the other of said groups adapted to rotate one of said numeral wheels in the other direction; a group of positioning bars of difi'erent order, each of said bars adapted to slide in a substantially stationary plane and to engage two of said carryin wheels; a group of carrying slides of di erent orders each slide adapted to slide in a substantially stationary lane; springs tending to move said slides in one direction; a group of locking members each adapted to rock in a substantially stationary plane; means adapted toshift said two groups of carrying wheels axially either in one direction so as to cause the carrying wheels of one of said two groups to get into the sliding planes of said positioning bars and of said carrying slides, or in the other direction so as to cause the carrying wheels of the other of said two groups to get into the sliding planes of said positioning bars and of said carrying slides; a releasing finger ri idly secured to each of said carrying wheels and adapted to cause one of said locking members of hi her order to be unlocked; means adapted toreciprocate said releasing fingers of each group of carrying wheels axially so as to cause the fingers of onei ofsaid groups to t into and the finrs of the other of sai groups to get out of t e planes of said locking members; means for actuating said positioning bars; and means operatively connecting to said actuating means and a apted to move each of said carryingslides in the other direction and thus rotating the corresponding carrying wheel one step.

4. In a computing machine the combination of a group of numeral wheels of different order; two groups of carrying wheels of different order, each of the carrying wheels of one of said groups adaptedto rotate one of said numeral wheels in the one direction, each of the carrying wheels of the other of said groups adapted to rotate one of said numeral wheels in the other direction; a group of positioning bars of different order, each of said bars adapted to slide in a substantially stationary plane and to engage two of said carrying wheels; an adjustable frame; a group of carrying slides of difierent orders slidably mounted in said frame; springs attached to said slides and tendi to move them in one direction; a group t locking levers pivotally secured to a stationary part of the machine, said levers normally locking said carrying slides and adapted to release to permit the carrying slides to move in the sense of the tension of said springs; means adapted to shift said adjustable frame either in one direction so as to cause the carrying wheels of one of said two groups to get into the sliding planes of said positioning bars and of said carrying slides, or in the other direction so as to cause the carrying wheels'of the other of said two groups to get into the sliding planes of said positioning bars and of said carrying slides; a releasing finger rigidly secured to each of said carrying wheels and adapted to cause one of said locking members of higher order to be unlocked; means adapted to reciprocate said releasing fingers of each group of carrying wheels axially so as to cause the fingers of one of said groups to get into and the fingers of the other of said groups to get out of the planes of said locking members;

-means for actuating said positioning bars;

and means operatively connecting to said actuating means and adapted to move each of said carrying slides in the other direction and thus rotating the corresponding carrying wheel one. step.

5. In a computing machine having a machine frame the combination of, a group of numeral wheels of different order; two groups of carrying wheels of different order, each of the carrying wheels of one of said groups adapted to rotate one of said numeral wheels in the one direction, each of the carrying wheels of the other of said groups adapted to rotate one of said numeral wheels in the other direction; a group of positioning bars of different order, eac of said bars adapted to slide in a substantially stationary plane and to engage two of said carry ng wheels; a slide frame; a grou of carrying slides of different orders slidab y mounted in said slide frame; springs attached to said slides; a group of locking levers pivotally secured to a stationary part of said machlne frame, said levers normally locking said carrying slides and adapted-to release to permit the carrying slides to move in the sense of the tension of said springs; means adapted to shift said slide frame either in one direction so as to cause the carrying wheels of one of said two groups to get into the sliding planes of said positioning bars and of said carrying slides, or in the other direction so as to cause the carrying wheels of the other of said two groups to get into the sliding'planes of said positioning bars and of said carrying slides; a releasing finger rigidly secured to. each of said carrying wheels and adapted to cause one of said looking members of higher order to be unlocked; means adapted to reciprocate said releasing fingers of each group of carrying wheels axially so as to cause the fingers of one of said groups to get into and the fingers of the other of sai groups to get out of the planes of said locking members; means for actuating said positioning bars; and means operatively connecting to said actuating means and adapted to move each of said car rying slides in the other direction and thus rotating the corresponding carrying wheel one step.

6. In a computing machine the combination as claimed in claim 1, further characterized in said carrying members constituting slides slidably mounted in a frame, a plurality of said locking members each consisting of a locking lever adapted to engage one of said slides and to lock it, and of an actuating lever operatively connected to each of said locking levers and adapted to be engaged by the releasing members of the lower order one of said carrying slides.

7. In a computing machine the combination as claimed in claim 6, further characterized in two intermediatemembers being pivotally connected to said carrying slides so as to be both able to engage one of said actuating levers, and means to move said groups of carrying wheels so as to cause the releasing members of the carrying wheels of one of said two groups to get into the ath of said actuating levers and the releaslng members of the carrying wheels of the other of said two groups to get out of the path of said actuating levers and vice versa.

8. In a computing machine as claimed in claim 2, further characterized in said carrying slides and said; positioning members both being guided in a common frame adjustable in two end positions, said adjustable frame constituting means to cause the releasing fingers to engage the looking members, as well as means to cause said positioning bars and said carrying slides to engage the carrying wheels.

9. In a computing machine the combination, of two tens carryin wheels meshing with each other; a numera wheel adapted to be rotated by means of one of said carrying wheels in the one direction and by means of the other one in the other direction; a posi-' tioning rack and a slide both adapted to engage either one or the other of said carrying wheels; a locking means adapted to lock said slide in its one end position; a spring attached to said slide and tending to move it in its other end position; means adapted to move the slide in its one end position and thereby rotating one of said carrying wheels one step; a tens carrying pin positively connected to each of said carrying wheels, each of said pins adapted to release said locking means so as to cause said slide to be unlocked; and means for actuating said positioning rack.

10. In a computing machine having a machine frame the combination of, two tens carrying wheels meshing with each other; a numera-l wheel ada ted to be rotated by means of one of sai carrying wheels in the one direction and by means of the other one in the other direction; a positioning rack and a slide both adapted to engage either one or the other of said carrying wheels; a locking lever pivotally connected to said machine frame and adapted to lock said slide in its one end position; a spring attached to said slide and tending to move it in its other end position; means adapted to move the slide in its one end position and thereby rotating one of said carrying wheels one step; a tens carrying pin positively connected to each of said carr ing wheels, each of said pins adapted to release said locking means so as to cause said slide to be unlocked; and means for actuating said positionin rack.

11. n a computing machine having a machine frame the combination of, a positioning rack; a carrying slide; two toothed carrying wheels each adapted to engage either said rack or said slide; a numeral wheel adapted to be rotated from said rack by the intermedium of either the one or of both of said carrying wheels; a locking lever pivotally connected to a stationary part of the machine frame and adapted to lock said slide in its one end position; a spring tending to move said slide in its other end position; means adapted to move the slide in its one end position when being in engagement with one of said carrying wheels and thus causing this wheel to rotate a tooth; a releasing member connected to each of said carrying wheels and adapted to cause said locking lever to release so as to unlock said slide; and means for actuating said positioning rack.

12. In a computing machine having a machine frame the combination of, a positioning rack; a carrying slide; two toothed carrying wheels each adapted to engage either said rack or said side; a numeral wheel adapted to be rotated from said rack spring tending to move said slide in its other end position; means adapted to move the slide in its one end position when being in engagement with one of said carrying wheels and thus causing this wheel to rotate a tooth; two triggers pivotally connected to said slide; a higher order carrying slide; a higher order locking lever adapted to lock said higher order carrying slide in its one end position; a spring tending to move said higher order carrying slide in its other end position; an actuating member adapted to ositively move said higher order locking ever 'out of its locking position; both of said triggers adapted to engage said actuating member; releasing means connected to each of said carrying Wheels; means to cause either the one or the other of said releasing means to so operate one of said triggers as to cause said actuating member and said higher order locking lever to be raised, and said higher order carrying slide to be unlocked; and means for actuating said posi tioning rack.

' 13. In a computing machine having a machine frame the combination of, a positioning rack; two carrying wheels each adapted to be coupled either to said rack or to said slide by means of axially shifting; a Iiumeral wheel adapted to be rotated from said rack by the intermedium of either the one or of both ofsaid carrying wheels; a locking lever pivotally connected te a stationary part of the machine frame and adapted to lock said slide in its one end position; a spring tending to move said slide in its other end position; means adapted to move the slide in its one end position when being in engagement with one of said carrying wheels and thus causing this wheel to rotate a tooth; releasing means rigidly connected to each of said carrying wheels and adapted to move said locking lever so as to unlock said slide; and means for actuating said positioning bar.

14. In a oomputingmachine having a machine frame the combination of, a positioning rack; two carrying wheels eachi adapted to be coupled either to said rack or to said slide by means of axially shifting; a numeral wheel adapted to be rotated from said rack by the intermedium of either the one or of both of said carrying wheels; a locking lever pivotally connected to a stationary part of the machine frame and adapted to lock said slide in its one end position; a

spring tending to move said slide in its other end position; means adapted to move the slide in its one end position when being in engagement with one of said carrying Wheels and thus causing this wheel to rotate a tooth; releasing means rigidly connected to each of said carrying wheels and adapted to move said locking lever so as to unlock said slide; and means for actuating said positioning bar, said actuating means being operatively connected to said means for moving the slide in its one end position.

15. In a computing machine a tens carrying device comprising rotatable carrying means operatively connected to the numeral wheels of the computing machine, a carrying member movable in two directions and adapted to rotate said carrying means a step both in the one and in the other sense, on being itself shifted only in one of said two directions; means adapted to move said carrying member in the other direction; a locking member adapted to lock said carrying device against movement in one of said two directions; releasing means positively connected to said carrying means and adapted to release said locking member; positioning means adapted to rotate said carrying means and means for actuating said positioning means; said releasing means comprising a releasing member movably moun ed on said carrying member and a finger rigidly attached to said carrying means, said finger adapted to engage said releasing member.

16. In a computing machine the combination as claimed in claim 1, further characterized in each of said locking members comprising a locking lever adapted to lock one of said carrying slides and an actuating member adapted to be operated by two of said releasing members, said actuating members being positively connected to 'said looking lever.

17. In a-computing machine the combination as claimed in claim 1, further characterized in each of said locking members comprising a locking lever adapted to lock one of said carrying members and an actuating lever rigidly connected to said locking lever In testimony whereof I affix mysignature in presence of two witnesses.

' PAUL REISS.

Witnesses:

RUFORD PAPKE,

HOWARD A. Bowmanr 

